An important system where quantum effects were observed is two-dimensional electron gas (2DEG).Two-Dimensional Electron gas offers a large Fermi Wavelength that is composable to the smallest device size achievable and a much higher mobility. These advantages facilitates the studies of quantum transports in nanostructores. When things become in a nanoscale so it have high speed and it act as wave nature. Это и многое другое вы найдете в книге Strongly Magnetized 2DEG and Pair Interaction of Electron (Zelalem Abebe)